A method for plugging a blast hole

A blast hole blocking and blast hole technology, applied in blasting and other directions, can solve the problems of difficult construction work and unsatisfactory clogging effect, and achieve the effects of being beneficial to environmental protection, improving construction efficiency and reducing environmental pollution

Active Publication Date: 2020-05-26
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the blocking effect of the existing blasting blocking structure is not ideal or the construction operation is difficult, the present invention proposes an economical and environmentally friendly, fast and convenient construction, and an efficient and reliable plugging method for blastholes

Method used

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  • A method for plugging a blast hole

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Embodiment Construction

[0024] Below by embodiment, in conjunction with accompanying drawing, the technical scheme of the present invention is described further specifically, as figure 1 As shown, in a quarry, the drilling and blasting method is used to mine stone. The diameter of the blast hole is 90mm, the depth of the blast hole is 2.5m, and the length of the plugging section is 0.8m. The construction method adopts the following steps:

[0025] Step 1. Determine the number and diameter of spherical expansion bags 2 to be placed in the blockage section according to the length of the blockage section and the diameter of the blast hole, and collect drilling cuttings at the construction site. The distance between adjacent spherical expansion bags is 0.15m, and the first The spherical expansion bag is 0.15m away from the air spacer, the bottom of the uppermost spherical expansion bag is 0.10m away from the top of the blast hole, the number of spherical expansion bags is 4, and the diameter of the dry sp...

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Abstract

The invention provides a blast hole blocking method. An air spacer is arranged between a blast hole blocking section and a charging section; the blocking section is composed of spherical expansion bags capable of automatically expending after absorbing water, and rock debris, the spherical expansion bags are arranged in rock debris stemming at intervals and quickly expand after absorbing the water, extrusion action is conducted on the surrounding rock debris, and the bonding power and friction force between the rock debris are rapidly improved. Meanwhile, lateral expansion of the expansion bags is limited by the walls of holes, partial self locking is formed, accordingly, blasting gas is effectively prevented from overflowing out of the blast holes, the acting time of the blasting gas to rock is prolonged, the explosive energy is sufficiently utilized, and the blasting effect is improved. The blast hole blocking method is quick in construction, economical, environmentally friendly, efficient and reliable in hole blocking and capable of greatly improving the blasting effect.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and in particular relates to a method for blocking blastholes in rock mass blasting construction applicable to fields such as mines, water conservancy and hydropower, and transportation. Background technique [0002] With the improvement of engineering technology in our country, engineering blasting technology has developed rapidly in water conservancy, railway, mining and other projects, and blast hole plugging is an important link in drilling and blasting construction. Whether the blast hole is blocked or not has no obvious effect on the peak value of the blast shock wave, but the subsequent pressure reduction, especially the reduction of the explosion gas pressure and the time it takes to crack the rock, are all related to whether the blast hole is blocked. Because the blockage has a certain mass, the gas produced after the explosion of the explosive will accelerate to a very high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 叶志伟陈明卢文波严鹏王高辉
Owner WUHAN UNIV
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